This Gruul goblin shaman commander gives your non-human creatures a +1/+1 counter when they enter the battlefield
The once per turn clause on its triggered ability makes it impossible to break, and the card as it stands is almost too fair
There are some pretty chonky flyers in the decks too, with Brainstealer Dragon being at once a great card for the exile-and-play-opponents-cards archetypes, but also a great fit for reanimator decks that want to steal other players stuff
I tend to frown upon commanders whose only ability is an enter-the-battlefield trigger, because, unless youre in a dedicated blink deck, that triggers just not going to happen often enough for value
Most of the value here comes from the activated ability, which is a good way to get value in the late game since you can get 4 counters at a time
The only downside with this card is that you want to have a significant number of hits for both types